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Fast synthesis and screening of materials are vital to the advance of materials science and are an essential component of the Materials Genome Initiative.Here we use copper-oxide superconductors as an example to demonstrate the power of integrating combinatorial molecular beam epitaxy synthesis with high-throughput electric transport measurements.Leveraging this method,we have generated a phase diagram with more than 800 compositions in order to unravel the doping dependence of interface superconductivity.In another application of the same method,we have studied the superconductorto-insulator quantum phase transition with unprecedented accuracy in tuning the chemical doping level.